The syntax of the `if' command is:
if TEST-COMMANDS; then
[elif MORE-TEST-COMMANDS; then
Execute CONSEQUENT-COMMANDS only if the final command in
TEST-COMMANDS has an exit status of zero. Otherwise, each `elif'
list is executed in turn, and if its exit status is zero, the
corresponding MORE-CONSEQUENTS is executed and the command
completes. If "`else ALTERNATE-CONSEQUENTS'" is present, and the
final command in the final `if' or `elif' clause has a non-zero
exit status, then execute ALTERNATE-CONSEQUENTS.
The syntax of the `case' command is:
`case WORD in [PATTERN [| PATTERN]...) COMMANDS ;;]... esac'
Selectively execute COMMANDS based upon WORD matching PATTERN.
The ``|'' is used to separate multiple patterns.
Here is an example using `case' in a script that could be used to
describe an interesting feature of an animal:
echo -n "Enter the name of an animal: "
echo -n "The $ANIMAL has "
case $ANIMAL in
horse | dog | cat) echo -n "four";;
man | kangaroo ) echo -n "two";;
*) echo -n "an unknown number of";;
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